AMC1301: Reverse polarity

Hi Vincent,

Welcome to our e2e forum!

If you are referring to VDD1 or VDD2 with respect to GND1 or GND2, the AMC1301 has no internal protection against reverse voltage. The Absolute Maximum Ratings (section 7.1) table shows the voltage and current limits which is based on the internal ESD cell limitations.   

Hi Tom.

Thanks for your answer.

I understand my question is quite surprising, but I have a design case, in which I should have a reverse voltage between Vcc1 and Gnd1.

Minimum reverse voltage is indicated on section 7.1, but unfortunately, it is not indicated if the chip is consuming current when in reverse voltage biasing (Respecting minimum value negative voltage).Current mentionned into section 7.1 indicates maximum input value accepted by the internal diode protection referenced to Vcc or gnd.

Does these reverse current consumption value exist ?

Thanks per advance.

Sincerly,

Vincent Marsaud

Hi Vincent,

I don't have any specific value to share with you.  The chip itself won't be consuming any current beyond some small leakage perhaps with your applied -250 mV.  Beyond the 300 mV limit though you'd start to see what looks like a short circuit.